Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

46578 Products showing for Fuses & Circuit Breakers

2272 / 999+
Better World
Siemens SENTRON 3VA1 MCB, 1P, 100A
  • RS Stock No. 224-7785
  • Mfr. Part No. 3VA1110-3ED16-0AA0
Each
MYR1,063.21
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 4 channels
  • RS Stock No. 259-4675
  • Mfr. Part No. 1SDA072950R1
Each
MYR62,911.14
ABB Emax2 Electronic Circuit Breaker 800A Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-4025
  • Mfr. Part No. 1SDA072096R1
Each
MYR19,992.79
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3460
  • Mfr. Part No. 1SDA071413R1
Each
MYR33,959.15
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7952
  • Mfr. Part No. C25N4TM160
Each
MYR11,023.20
Siemens 230V ac Circuit Trip
  • RS Stock No. 223-7635
  • Mfr. Part No. 5TT4428-0
Each
MYR437.83
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4004
  • Mfr. Part No. 3VA2110-7KQ46-0AA0
Each
MYR11,934.26
Siemens SENTRON Long Rear Connection for use with 3VA5 125
  • RS Stock No. 269-7107
  • Mfr. Part No. 3VA9134-0QE00
Each (In a Pack of 4)
MYR127.638
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 25 kA
  • RS Stock No. 209-6760
  • Mfr. Part No. 3VA1116-3EE46-0AA0
Each
MYR5,019.56
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9558
  • Mfr. Part No. 3VA10104ED420AA0
Each
MYR2,930.84
Better World
Siemens, SENTRON MCCB 4P 16A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 271-9460
  • Mfr. Part No. 3VA1196-4GE46-0AA0
Each
MYR2,498.93
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4129
  • Mfr. Part No. 3VA2116-8HN42-0AA0
Each
MYR10,284.81
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-3935
  • Mfr. Part No. 3VA2110-0KP46-0AA0
Each
MYR12,426.41
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 15A Current Rating
  • RS Stock No. 221-5610
  • Mfr. Part No. 3-128-217
Each
MYR80.19
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 271-9500
  • Mfr. Part No. 3VA1340-7FF42-0AA0
Each
MYR10,637.30
Vigi iC60 - earth leakage add-on block -
  • RS Stock No. 248-3706
  • Mfr. Part No. A9V15263
Each
MYR1,929.33
Eaton Eaton xEffect Conversion Kit for use with K3X240
  • RS Stock No. 243-933
  • Mfr. Part No. 029769 D-K3X240
Each
MYR505.70
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3928
  • Mfr. Part No. 1SDA071964R1
Each
MYR190,112.58
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3030
  • Mfr. Part No. 1SDA070883R1
Each
MYR33,385.11
Schneider Electric, ComPacT MCCB 3P 500A, Fixed Mount
  • RS Stock No. 260-8211
  • Mfr. Part No. C63H31M500
Each
MYR28,230.05
1
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